package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.anno.AutoFill;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.enumeration.OperationType;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.EmployeeNameExistException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.properties.JwtProperties;
import com.sky.result.PageResult;
import com.sky.service.admin.EmployeeService;
import com.sky.utils.JwtUtil;
import com.sky.vo.EmployeeLoginVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class EmployeeServiceImpl  implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    @Autowired
    private JwtProperties jwtProperties;


    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    @Override
    public EmployeeLoginVO login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //  后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus().equals(StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //登录成功后，生成jwt令牌
        Map<String, Object> claims = new HashMap<>();
        claims.put(JwtClaimsConstant.EMP_ID, employee.getId());
        String token = JwtUtil.createJWT(
                jwtProperties.getAdminSecretKey(),
                jwtProperties.getAdminTtl(),
                claims);
        EmployeeLoginVO employeeLoginVO = EmployeeLoginVO.builder()
                .id(employee.getId())
                .userName(employee.getUsername())
                .name(employee.getName())
                .token(token)
                .build();

        //3、返回实体对象
        return employeeLoginVO;
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }

    /**
     * 修改员工账号的启用状态
     * @param id,status
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public void updateStatus(Long id, Integer status) {
        Employee employee=Employee.builder()
                .id(id)
                .status(status)
                .updateUser(BaseContext.getCurrentId())
                .updateTime(LocalDateTime.now())
                .build();
        employeeMapper.update(employee);
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void add(EmployeeDTO employeeDTO) {
        Employee dbUsername = employeeMapper.getByUsername(employeeDTO.getUsername());
        if (dbUsername != null){
            throw new EmployeeNameExistException("当前用户名已存在");
        }
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @Override
    public PageResult pageQuery(Integer page, Integer pageSize, String name){
        PageHelper.startPage(page, pageSize);
        Page<Employee> pageResult = employeeMapper.pageQuery(name);
        return new PageResult(pageResult.getTotal(), pageResult.getResult());
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void update(Employee employee) {
        employeeMapper.update(employee);
    }
}
